Troubleshoot an engine start

Starting conditions

Keep the aircraft secured. Avoid repeated start attempts while changing several settings at once.

Electrical source

Check source, buses and batteries on the electrical synoptic.

Inspect the electrical synoptic and verify that the expected buses have power. Note the GPU, APU and battery state.

Pneumatic source

Check the available APU or other source, bleed selection, manifold pressure and relevant valve indications.

Selector and ignition

Check the correct engine selector and ignition state. FSS describes AUTO as FADEC-controlled ignition and says ignition OFF inhibits fuel during a ground start. Check the selected state and actual indications.

Engine response

Observe whether N2 increases and whether fuel flow and temperature follow. Write down the actual indications, not merely “the engine did not start”.

External inputs

Inspect duplicate or continuous hardware commands.

Check for duplicate engine, fuel, ignition, mixture or throttle assignments and external hardware sending continuous commands.

Repeatable start test

Correct one item at a time; record the changed result.

After correcting one item, repeat the test and record what changed. If the indications remain abnormal, consult the applicable FSS guidance and support. ^[117]